A076180 Indices of spheres mentioned in A071609.

1, 2, 5, 8, 13, 23, 35, 63, 76, 86, 123, 163, 226, 264, 287, 374, 514, 523, 576, 664, 715, 787, 924, 927, 963, 1074, 1137, 1364, 1487, 1576, 1786, 2176, 2475, 2614, 2837, 2877, 2925, 3536, 3576, 4025, 4487, 4638, 5215, 6026, 6527, 6726, 6774

Offset

1,2

References

J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, Table 4.3, p. 107.

Links

Table of n, a(n) for n=1..47.

Hugo Pfoertner, Spheres containing record numbers of lattice points of Z^3

Formula

a(n) = k for which A000378(k) = A071609(n)

Example

a(7)=35 because A000378(35)=A071609(7)=41

Crossrefs

Cf. A000378, A005875, A071609.

Sequence in context: A015724 A290133 A089897 * A326506 A229898 A200275

Adjacent sequences: A076177 A076178 A076179 * A076181 A076182 A076183

Keyword

nonn

Author

Hugo Pfoertner, Nov 01 2002

Status

approved